10 pills per serving...it seems weird to me also but again they reccomend strongly not to take it ED EOD at most. My pump lasted about 20hours and it was most intense probably hour 8-15!!! it was unlike any NO supplement I have ever taken. I didnt notice anyhting crazy the first hour or two, a little pump but like a NO shotgun kind of pump nothing HUGE, until later that night. I am happy witht this product i just need to find it a little cheaper